diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 6a161579..3509f00a 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -43,5 +43,5 @@ jobs:
       - name: Install Nix
         uses: determinateSystems/nix-installer-action@v12
       - uses: DeterminateSystems/magic-nix-cache-action@v7
-      - uses: DeterminateSystems/flake-checker-action@main
-      - run: nix-shell --run "make test-bitcoin-cln"
+      - uses: DeterminateSystems/flake-checker-action@v8
+      - run: nix develop --command make test-${{matrix.test-vector}}